<template>
  <div class="page-login">
    <div class="page-login--layer page-login--layer-area">
      <ul class="circles">
        <li v-for="n in 10" :key="n"></li>
      </ul>
    </div>
    <div class="page-login--layer">
      <div class="page-login--content" flex="dir:top main:justify cross:stretch box:justify">
        <div class="page-login--content-header">
          <p class="page-login--content-header-motto">{{ dailyWord }}</p>
        </div>
        <div class="page-login--content-main" flex="dir:top main:center cross:center">
          <!-- logo -->
          <img class="page-login--logo" src="./image/logo@2x.png">
          <!-- form -->
          <div class="page-login--form">
            <el-card shadow="never">
              <el-form ref="loginForm" label-position="top" :rules="rules" :model="formLogin" size="default">
                <el-form-item prop="username">
                  <el-input type="text" v-model="formLogin.username" placeholder="用户名">
                    <i slot="prepend" class="fa fa-user-circle-o"></i>
                  </el-input>
                </el-form-item>
                <el-form-item prop="password">
                  <el-input type="password" v-model="formLogin.password" placeholder="密码">
                    <i slot="prepend" class="fa fa-keyboard-o"></i>
                  </el-input>
                </el-form-item>
                <el-button size="default" @click="submit" type="primary" class="button-login">登录</el-button>
              </el-form>
            </el-card>
            <!-- quick login -->
            <el-button class="page-login--quick" size="default" type="info" @click="dialogVisible = true" v-if="$env === 'development'">
              快速选择用户（开发环境功能）
            </el-button>
          </div>
        </div>
        <div class="page-login--content-footer">
          <p class="page-login--content-footer-copyright">
            Copyright
            <d2-icon name="copyright"/>
            2020 西蜀网技术研发中心 提供技术支持 <a href="http://www.xishu365.com/">@西蜀云</a>
          </p>
          <p class="page-login--content-footer-options">
            <a href="#">帮助</a>
            <a href="#">隐私</a>
            <a href="#">条款</a>
          </p>
        </div>
      </div>
    </div>
    <el-dialog v-if="$env === 'development'" title="快速选择用户" :visible.sync="dialogVisible" width="400px">
      <el-row :gutter="10" style="margin: -20px 0 -10px 0;">
        <el-col v-for="(user, index) in users" :key="index" :span="8">
          <div class="page-login--quick-user" @click="handleUserBtnClick(user)">
            <d2-icon name="user-circle-o"/>
            <span>{{user.name}}</span>
          </div>
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>

<script>
import { mapActions } from 'vuex'
import { getDailyWord } from '@/api/user'

const ENV = process.env.NODE_ENV === 'production'
const USERNAME = ENV ? '' : 'admin'
const PASSWORD = ENV ? '' : '123456'
export default {
  data () {
    return {
      env: ENV,
      dailyWord: '时间是一切财富中最宝贵的财富。',
      // 快速选择用户
      dialogVisible: false,
      users: [
        {
          name: 'admin',
          username: 'admin',
          password: '123456'
        },
        {
          name: '西蜀网',
          username: '西蜀网',
          password: '123456'
        },
        {
          name: '大宜宾',
          username: '大宜宾',
          password: '123456'
        }
      ],
      // 表单
      formLogin: {
        username: USERNAME,
        password: PASSWORD
      },
      // 表单校验
      rules: {
        username: { required: true, message: '请输入用户名', trigger: 'blur' },
        password: { required: true, message: '请输入密码', trigger: 'blur' }
      }
    }
  },
  created () {
    // this.listenEnter()
    this._getDailyWord()
  },
  methods: {
    ...mapActions('d2admin/account', ['login']),
    handleUserBtnClick (user) {
      this.formLogin.username = user.username
      this.formLogin.password = user.password
      this.submit()
    },
    submit () {
      this.$refs.loginForm.validate((valid) => {
        if (valid) {
          this.login(this.formLogin).then(() => {
            this.$router.replace(this.$route.query.redirect || '/')
          })
        }
      })
    },
    _getDailyWord () {
      getDailyWord().then(res => {
        if (res && res.note) {
          this.dailyWord = res.note
        }
      })
    }
  }
}
</script>

<style lang="scss">
  .page-login {
    @extend %unable-select;
    $backgroundColor: #F0F2F5;
    // ---
    background-color: $backgroundColor;
    height: 100%;
    position: relative;
    // 层
    .page-login--layer {
      @extend %full;
      overflow: auto;
    }

    .page-login--layer-area {
      overflow: hidden;
    }

    // 时间
    .page-login--layer-time {
      font-size: 24em;
      font-weight: bold;
      color: rgba(0, 0, 0, 0.03);
      overflow: hidden;
    }

    // 登陆页面控件的容器
    .page-login--content {
      height: 100%;
      min-height: 500px;
    }

    // header
    .page-login--content-header {
      padding: 1em 0;

      .page-login--content-header-motto {
        margin: 0px;
        padding: 0px;
        color: $color-text-normal;
        text-align: center;
        font-size: 12px;
      }
    }

    // main
    .page-login--logo {
      width: 240px;
      margin-bottom: 2em;
      margin-top: -2em;
    }

    // 登录表单
    .page-login--form {
      width: 280px;
      // 卡片
      .el-card {
        margin-bottom: 15px;
      }

      // 登录按钮
      .button-login {
        width: 100%;
      }

      // 输入框左边的图表区域缩窄
      .el-input-group__prepend {
        padding: 0px 14px;
      }

      .login-code {
        height: 40px - 2px;
        display: block;
        margin: 0px -20px;
        border-top-right-radius: 2px;
        border-bottom-right-radius: 2px;
      }

      // 登陆选项
      .page-login--options {
        margin: 0px;
        padding: 0px;
        font-size: 14px;
        color: $color-primary;
        margin-bottom: 15px;
        font-weight: bold;
      }

      .page-login--quick {
        width: 100%;
      }
    }

    // 快速选择用户面板
    .page-login--quick-user {
      @extend %flex-center-col;
      padding: 10px 0px;
      border-radius: 4px;

      &:hover {
        background-color: $color-bg;

        i {
          color: $color-text-normal;
        }

        span {
          color: $color-text-normal;
        }
      }

      i {
        font-size: 36px;
        color: $color-text-sub;
      }

      span {
        font-size: 12px;
        margin-top: 10px;
        color: $color-text-sub;
      }
    }

    // footer
    .page-login--content-footer {
      padding: 1em 0;

      .page-login--content-footer-locales {
        padding: 0px;
        margin: 0px;
        margin-bottom: 15px;
        font-size: 12px;
        line-height: 12px;
        text-align: center;
        color: $color-text-normal;

        a {
          color: $color-text-normal;
          margin: 0 .5em;

          &:hover {
            color: $color-text-main;
          }
        }
      }

      .page-login--content-footer-copyright {
        padding: 0px;
        margin: 0px;
        margin-bottom: 10px;
        font-size: 12px;
        line-height: 12px;
        text-align: center;
        color: $color-text-normal;

        a {
          color: $color-text-normal;
        }
      }

      .page-login--content-footer-options {
        padding: 0px;
        margin: 0px;
        font-size: 12px;
        line-height: 12px;
        text-align: center;

        a {
          color: $color-text-normal;
          margin: 0 1em;
        }
      }
    }

    // 背景
    .circles {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      overflow: hidden;
      margin: 0px;
      padding: 0px;

      li {
        position: absolute;
        display: block;
        list-style: none;
        width: 20px;
        height: 20px;
        background: #FFF;
        animation: animate 25s linear infinite;
        bottom: -200px;
        @keyframes animate {
          0% {
            transform: translateY(0) rotate(0deg);
            opacity: 1;
            border-radius: 0;
          }
          100% {
            transform: translateY(-1000px) rotate(720deg);
            opacity: 0;
            border-radius: 50%;
          }
        }

        &:nth-child(1) {
          left: 15%;
          width: 80px;
          height: 80px;
          animation-delay: 0s;
        }

        &:nth-child(2) {
          left: 5%;
          width: 20px;
          height: 20px;
          animation-delay: 2s;
          animation-duration: 12s;
        }

        &:nth-child(3) {
          left: 70%;
          width: 20px;
          height: 20px;
          animation-delay: 4s;
        }

        &:nth-child(4) {
          left: 40%;
          width: 60px;
          height: 60px;
          animation-delay: 0s;
          animation-duration: 18s;
        }

        &:nth-child(5) {
          left: 65%;
          width: 20px;
          height: 20px;
          animation-delay: 0s;
        }

        &:nth-child(6) {
          left: 75%;
          width: 150px;
          height: 150px;
          animation-delay: 3s;
        }

        &:nth-child(7) {
          left: 35%;
          width: 200px;
          height: 200px;
          animation-delay: 7s;
        }

        &:nth-child(8) {
          left: 50%;
          width: 25px;
          height: 25px;
          animation-delay: 15s;
          animation-duration: 45s;
        }

        &:nth-child(9) {
          left: 20%;
          width: 15px;
          height: 15px;
          animation-delay: 2s;
          animation-duration: 35s;
        }

        &:nth-child(10) {
          left: 85%;
          width: 150px;
          height: 150px;
          animation-delay: 0s;
          animation-duration: 11s;
        }
      }
    }
  }
</style>
